Sound of a slight crack. Was it something dropped on the ground outside the window?

Coming back to it again after a few moments. That sounded like a brittle crack. No, I got the glasses here, yet to wash them. They are not cracked.
My mind wondered away to a conversation I heard earlier on the street. The letter is on the table, and Ayi (Ayida?) knows about what needs to do in the library before going to Linda. It sounded like Linda is somebody who could but would rather not take the trouble. We shared the path for about a minute and then the guy stopped to get something out of his bag in order to continue his phone conversation.
The coffee maker, it’s in the washing bowl but nothing wrong with it. The plates and sauces. They won’t make that brittle sound if they break.
It sounded like Ayi would pass Linda’s house anyway so doing it this way saves effort all round. The guy caught up to us as we were all then waiting at the traffic light. I couldn’t hear his conversation as I was busy talking to my companions.
Thinking about it now, it’s so usual that I walk along over a few streets when others are doing the same streets. If I take more notice, some of the people might be whom I had come across in the walks a few days back.
The coffee maker. It is. It slid down in the bowl and cracked. Not too obvious initially. It had slid down so many times. This time it did it. It cracked.
The crack must have happened as I started washing up. The first unusual sound I heard.